Which of the following accurately describes how a harmonic impacts electrical systems?

Harmonics are a phenomenon in electrical systems generated primarily by non-linear loads, such as computers, fluorescent lighting, and variable speed drives. These harmonics manifest as voltage and current distortions, deviating from the pure sine wave form that is ideal for efficient electrical operation. When harmonics are present, they can lead to various issues including overheating of equipment, interference with sensitive electronics, and increased losses in conductors and transformers.

The presence of harmonics can result in a distortion of current, which can cause not only inefficiencies but also potential damage to electrical components over time. This makes it crucial for electrical systems to be designed and maintained with considerations for harmonics to ensure reliable and safe operation. Understanding the effects of harmonics is essential for electrical contractors and engineers working to provide optimal performance in electrical installations.